Firearm



June 26, 1934. E. HAYSLIP 1,964,634

FIREARM Filed Nov. 6. 1953- UPMJ W 6 (Ittornegs v Patented June as, 1934 v UNITED stares PATENT orriee 14 Claims.

' arm, and for its object to provide a simple and inexpensit e mechanism which may be readily insta lielfih a conventional quasi-automatic fire-arm withbtzt necessitating any major alteration of thefgiin structure, or initially installed in the gun at ithe time of manufacture.

' Although the principle of my invention may-be applied in connection with numerous conventional fire-arms, it is primarily adapted for application to a quasi-automatic fire-arm or pistol of 15 the type shown and described in the patent to John Browning, No. 1,070,582, issued Aug. 19, 1313-. Fire-arms of this class although known as automatic fire-arms, are only automatic insofar as the ejection of spent shells and the cocking of the hammer are concerned, and it is necessary for the operator to repeatedly pull the trigger each time a shell is fired.

It is the primary object of my present invention to provide a mechanism by means of which particularly pointed out in the appended claims.

Referring to the drawing in which numerals of like character designate similar parts throughout the several views,

Fig. 1 is a fragmentary sectional view of the firing mechanism of a conventional quasi-automatic fire-arm to illustrate by comparison the necessary changes in the application of my invention. It will be noted that the mechanism illustrated in this figure forms no part of my invention.

Fig. 2 is a view in side elevation of a fire-arm equipped with my improved attachment, the firing mechanism of said fire-arm being shown in section.

Fig. 3 is a detail view of the hammer after the alteration has been effected, showing in dotted lines that portion which is removed to accommodate my invention.

Fig. 4 is a detail of the firing pin stop showing '5 the spring release extension.

the action of the hammer is timed with respect 7 Fig. 5 is a detail of the safety showing in dotted lines the portion thereof which is removed to facilitate the installation of my improvement.

Fig. 6 is a modification of the timing mechanism, and

Fig. '7 is a detail perspective of the timing spring.

In the drawing, 1 represents the frame of a conventional quasi-automatic pistol having a barrel 2 mounted thereon and a breech slide 3 which reciprocates rearwardly and forwardly upon the frame under the action of the recoil and of the reaction spring. 4 represents a downward extension of the frame which forms a handle or grip, and 5 the trigger which is operatively connected through the medium of conventional mechanism (not shown), to the hammer releasing sear 6.

Referring to Fig. l which illustrates the conventional firing mechanism of the pistol, I designates the firing pin which is retained in place by a firing pin stop member 8, the hammer 9 being shown in retracted position and the safety 10 in locked engagement with the breech slide.

The alteration of this conventional mechanism and the installation of my improved structure comprises the application of a resilient strip 11 to the base portion of the hammer 9 as shown in Figs. 2 and 3, one end of said strip being brazed or otherwise secured to the hammer with its free end normally projecting in spaced relation from the hammer and adapted to abut the end portion 12 of the frame 1 to retain the hammer in retracted position after the release of sear 6 by the operation of the trigger. To the conventional firing pin stop 8, I add a downwardly projecting lug or extension 13 (Fig. 4) which upon the forward movement of the breech slide 3 engages the free end of the resilient strip 11, depressing the same and. releasing it from its abutment with the portion 12 of the frame. In released position the resilient strip 11 follows under the frame in the space between the latter and the hammer, the free end of said strip being recessed as at 11 (Fig.

7) to clear the safety 10.

In order to accommodate the extended firing pin stop, the conventional hammer 9, when the device is applied to this particular type of pistol, must be filed or ground down at the upper extremity of its engaging face as shown in Fig. 3. Here it will be seen that the portion 14 shown in dotted lines is removed from the hammer to permit the free forward and rearward movement of the breech slide without obstructing the extention 13 on the firing pin stop 8. Furthermore, in order to prevent the locking of the breech slide by the conventional safety 10, each time the gun is fired, I file or grind down the upper extremity of the safety 10. In Fig. 5 I have shown in dotted lines at 15 that portion of the safety which is removed.

Aside from the alterations and additions just described, the basic structure and mechanism of the gun remains unchanged and as this conventional mechanism forms no part of my present invention, it is believed unnecessary to go into the operation thereof as it will be readily apparent to one skilled in the art.

While I have shown and described the means for timing the operation of the hammer 9 as comprising a resilient strip 11, it is obvious that various other elements for performing this function could be employed with equal-effect. For example, in Fig. 6 I have shown a modification wherein the base portion of the hammer 9 is drilled with a vertical hole or well 16 adapted to receive a sliding pin or latch 17, the latter being normally forced outwardly by a coil spring or the like 18. In its outward position the face of the pin 17 engages the abutment12 on the frame 1 and retains the hammer 9 in cocked position, the forward movement of the breech slide 3 causing the extension 13 on the firing pin stop to engage the beveled .rear face of the pin 17, forcing the latter downwardly and releasing the hammer in a manner similar to the operation of the mechanism shown in Fig. 2. .In this modified form it will ,be seen that the pin 17 is prevented from coming out of the well 16 by the contact of the lower face of the breech slide with the upper end of the pin.

The operation of a fire-arm equipped with my improved timing mechanism is obvious. The magazine is first filledwith cartridges, and at this point it may be stated that the conventional magazine may if desired be replaced by a longer magagine adapted to retain and deliver to the chamber any number of cartridges. To initially fire the gun, the hammer 9 must first be cockedby hand and when the trigger is pulled releasing the sear 6, the hammer engages the firing pin '7 and fires the first cartridge. Therecoil of the explosion slides the breech slide '3 rearwardly in the conventional manner, ejecting the spent shell and cocking the hammer, afresh cartridge being simultaneously introduced into the chamber, the hammer being retained in cocked position by engagement of the strip 11 with the abutment 12 on the frame 1 The return of the breech slide to its forward closed position, assuming that the trigger 5 remains retracted, brings the extension 13 on the firing pin stop into engagement with the resilient strip 11 forcing the same downwardly and releasing the hammer to fire the next cartridge.

It will be noted that with this ,mechanism the operation of the hammer is timed so as to allow the breech slide and the firing pin stop to return to firing position before the hammer is released, thus providing a suflicient distance of travel of the hammer to afford the required impact against the firing pin. Furthermore, it will be observed that as long as the trigger remains retracted the gun will continue to fire and eject spent shells until the magazine is emptied. On the other hand, the release of pressure from the trigger will immediately discontinue the firing of the gun in the conventional manner by the engagement of the sear 6 with the adjacent abutment on the base of the hammer.

In the event that it is desired to temporarily restore the gun to a single shot fire-arm, this may readily be accomplished by simply replacing the shortened safety 10 with a longer or unaltered safety element. Thus the gun would again operate in the conventional manner.

It will be apparent that a fire-arm equipped with my improved mechanism may be employed as a continuously firing gun in the nature of a small machine gun, the number of shells fired being controlled by the operation of the trigger. In other wordsgan'y number of cartridges may be fired as desired.

This attachment is very simple, inexpensive and efficient, requiring no adjustment after installat-ion. There are no parts to become out of order or to cause the gun to jam, and perfect timing is insured. Furthermore, the gun must have reached closed position before firing takes place. Should any of the parts become worn it is obvious that they may be replaced at a small cost and with a minimum of effort.

From the foregoing it is believed that the operation and advantages of my inventionmay be readily understood by those skilled in the art without further description, it being borne in mind that numerous changes may be made in the details-disclosed without departing from the spirit of the invention as set forth in the following claims.

What I claim and desire to securesby Letters Patent is:--

1. In a fire-arm comprising a frame, a breech slide reciprocably mounted on said frame, 'a trigger,- a hammer and a sear member controlled by the trigger for locking the hammer in retracted position, timing mechanism including an auxiliary sear member carried by the hammer for locking the same in retracted position on the completion of each rearward movement of the breech slide, and means on said breech slide for releasing said auxiliary sear member on each forward movement of the former.

2. In a fire-arm comprising a frame, a breech slide reciprocably mounted on said frame, a trig- .ger, a hammer and a sear member controlled by the trigger for locking the hammer in retracted position, timing mechanism including an auxpletion of each rearward movement of the breech slide, and means on said breech slide for releasing said auxiliary sear memberv on each forward movement of the former.

3. In a fire-arm comprising a frame, a breech slide reciprocably mounted on said frame, a trigger, a hammer and a sear member controlled by the trigger for locking the hammer in retracted position, timing mechanism including a spring actuated auxiliary sear member carried by the hammer and arranged to abut a portion of said frame for locking the hammer in retracted position on the completion of each rearward movement of the breech slide, and means on said breech slide for releasing said auxiliary sear member on each forward movement of the former.

4. In a fire-arm comprising a frame, a breech slide reciprocably mounted on said frame, a trigger, a hammer and a scar member controlled by the trigger for locking said hammer in retracted position, timing mechanism including an auxiliary sear member carried by said hammer adjacent the fulcrum thereof for locking said hammer in retracted position on the completion of each rearward movement of the breech slide, means for normally retaining one end of said auxiliary sear member in an extended position above the adjacent surface of the hammer and in abutting relation with a portion of said frame, and means on said breech slide for depressing said auxiliary sear member to release the same on each forward movement of said breech slide.

5. In a fire-arm comprising a frame, a breech slide reciprocably mounted on said frame, a trigger, a hammer and a sear member controlled by the trigger for locking said hammer in retracted position, timing mechanism including an auxiliary sear member carried by said hammer adjacent the fulcrum thereof for locking said hammer in retracted position on the completion of each rearward movement of the breech slide, means for normally retaining one end of said auxiliary sear member in an extended position above the adjacent surface of the hammer and in abutting relation with a portion of said frame, and an extension on said breech slide for depressing said auxiliary sear member to release the same on each forward movement of said breech slide.

6. In a fire-arm comprising a frame, a breech slide reciprocably mounted on said frame, a trigger, a hammer and a sear member controlled by the trigger for locking said hammer in retracted position, timing mechanism including an auxiliary sear member carried by said hammer adjacent the fulcrum thereof for locking said hammer in retracted position on the completion of each rearward movement of the breech slide, means for normally retaining one end of said auxiliary sear member in an extended position above the adjacent surface of the hammer and in abutting relation with a portion of said frame, and a downward extension on said breech slide terminating in a horizontal plane below the extended position of said auxiliary sear member for depressing said auxiliary sear member to release the same on each forward movement of said breech slide.

'7. Mechanism as claimed in claim 6 wherein said auxiliary sear member comprises a spring strip, one end of which is fixed to the upper surface of said hammer with its free end normally in engagement with said frame.

8. Mechanism as claimed in claim 6 wherein said auxiliary sear member comprises a vertically disposed pin reciprocably mounted in the base portion of said hammer, and spring means for normally forcing one end of said pin outwardly into abutting relation with a portion of said frame.

9. Mechanism as claimed in claim 6 wherein said auxiliary sear member comprises a vertically disposed pin reciprocably mounted in the base portion of said hammer, and spring means for normally forcing one end of said pin outwardly into abutting relation with a portion of said frame, the upper extremity of said pin being rearwardly beveled to present an inclined surface to the extension on said breech slide.

10. Mechanism as claimed in claim 6 wherein said downward extension comprises a downwardly elongated firing pin stop carried by the breech slide.

11. In a fire-arm comprising a frame, a breech slide reciprocably mounted on said frame, a trigger, a hammer and a sear member controlled by the trigger for locking the hammer in retracted position, timing mechanism including auxiliary means carried by the hammer for locking the same in retracted position on each rearward movement of the breech slide, and means for releasing said first named means on each forward movement of said breech slide.

12. In a fire-arm comprising a frame, a breech slide reciprocably mounted on said frame, a hammer, a sear member carried by the hammer for locking the same in retracted position on each rearward movement of the breech slide, and means on the breech slide for releasing said sear member on each forward movement of the former. 105

13. In a fire-arm comprising a frame, a hammer, a sear member for locking the hammer in retracted position, a trigger for releasing said sear member, a breech bolt carrying a firing pin shouldered at its rear end and a retractor spring, a 110 locking plate removably seated in the breech bolt and having an opening to receive the rear end of saidfiring pin, whereby said plate locks the firing pin in place and said firing pin locks said plate in place, means for converting said fire-arm 115 into a continuously firing fire-arm, said means in cluding an auxiliary sear member carried by said hammer for locking the latter in retracted position on each rearward movement of the breech bolt, and means for releasing said auxiliary sear 120 member on each forward movement of said breech bolt.

14. Means for converting a fire-arm as claimed in claim 13 wherein said last named means comprises an extension on said locking plate.

ESTELLE HAYSLIP. 

